1. Cell: The smallest functional and structural unit of all living things.
2. Prokaryote: single-celled organism that does not have a nucleus or membrane-bound organelles.
3. Eukaryote: an organism made up of cells that have a nucleus enclosed by a membrane.
4. DNA: molecule present in all living things, contains the information that determines the traits that a living thing inherits and needs to live.
5. Organelle: Structures within a cell that perform specific functions.
6. Nucleus: a membrane-bound organelle that contains the ell's DNA and that has a role in processes such as growth, metabolism, and reproduction.
7. Cytoplasm: the fluid inside the cell that acts as a cushion.
8. Cell Wall: A rigid structure that surrounds the cell membrane and provides support to the cell.
9. Cell Membrane: Protective layer that covers the ell's surface and acts as a barrier.
10. Mitochondria: An organelle that is the site of cellular energy; produces energy (ATP).
11. Chloroplast: Organelle that contains chlorophyll; the site of photosynthesis.
12. Lysosome: Organelle that digests wastes, cell parts, and foreign particles.
13. Homeostasis: The maintenance of constant internal state in a changing environment.
14. Diffusion: Movement of particles from areas of high concentration to low concentration.
15. Osmosis: The diffusion of water through a semipermeable membrane.
16. Photosynthesis: Process in which some organisms use sunlight, carbon dioxide, and water to make food.
17. Cellular Respiration: The process by which cells use oxygen to produce energy from food.
18. Mitosis: Process of cell division that form two new nuclei, each of which has the same number of chromosomes.